Waveshare RS485 CAN HAT for Raspberry Pi Zero/Zero W/Zero WH/2B/3B/3B+ Allows Stable Long Distance Communication

This is a HAT consisting of two isolated RS-485 channels - each with appropriate protection circuitry and a switchable termination resistor - connected to an SPI I/O expander. This is an unusual approach that has pros and cons: it keeps the onboard UART free for other uses like a serial console, but it does mean you'll need to do additional work to get this HAT up and running and working.Setup is actually pretty easy. Add this line to /boot/config.txt:dtoverlay=sc16is752-spi1,int_pin=24Once you do, you should have two additional ports ready to go, /dev/ttySC0 and /dev/ttySC1.More details are available by searching for Waveshare's wiki for "2-CH RS485 HAT", and I'd encourage you to view that before ordering. I found the instructions to be clear and comprehensive.

It worked as expected I was able to receive RS485 Information from battery to convert to CAN for the inverter using information I gathered from the Internet. This product should work for any application to convert RS485 to CAN or CAN to RS485.

The Waveshare 2-Channel Isolated CAN Bus Expansion HAT is a game-changer for Raspberry Pi enthusiasts looking to enhance their projects with robust communication capabilities. Featuring a dual-chip solution with MCP2515 and SN65HVD230, this expansion HAT offers unparalleled performance and reliability, making it an essential accessory for any Pi project requiring CAN bus connectivity.With two channels available, this HAT provides ample flexibility for connecting multiple CAN bus devices simultaneously, opening up a world of possibilities for data acquisition, monitoring, and control. Whether you're building a vehicle telemetry system, industrial automation solution, or smart home network, the Waveshare expansion HAT empowers you to take your projects to new heights.In addition to its performance and reliability, this expansion HAT boasts a host of onboard protection circuits, including TVS diodes and ESD protection, further safeguarding your Raspberry Pi and connected devices against electrical hazards.Setting up the Waveshare 2-Channel Isolated CAN Bus Expansion HAT is a breeze, thanks to its plug-and-play design and compatibility with Raspberry Pi models. Whether you're a novice hobbyist or a seasoned engineer, you'll appreciate the ease with which you can integrate this HAT into your projects.

This expansion module has performed well so far, I use it for dashboard monitoring of rpms before track testing. It adds 2 CAN FD channels and comes with an esd bag, screws, pin headers and spacer bolts. There is an adequate wiki page with instructions. I will update in the future if any issues arise but so far, 1 month after reinstallation, I've had no detectable errors.

the waveshare instructions are outdated and I encountered problems installing system and libraries.1. I could not make it work on any 64-bit os; it only works on armhf raspios.2. python3 libraries must be installed in venv.so the hat works but it took a long time and patience to make it work. I used Pi4-b.